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His "I Have a Dream Speech" is known around the world, but not enough people know about a speech Martin Luther King gave at Newcastle University after being given an honorary doctorate in 1967.

BBC Newcastle broadcast some of the long-lost footage shortly after the tape was discovered - but all this week we've been hearing what happened when our reporter Murphy Cobbing took the tape to the states.

We've played it to senior politicians, journalists and religious figures - but Murphy has now reached Kings back-yard in Atlanta.